<!DOCTYPE html>
<title>Test that createImageBitmap honors EXIF orientation</title>
<script src="../../../../../resources/testharness.js"></script>
<script src="../../../../../resources/testharnessreport.js"></script>
<style>canvas { outline: 1px solid black; margin-right: 1em; }</style>
<body>
<script>
function loadImage(src) {
    return new Promise(function(resolve) {
        const image = new Image();
        image.addEventListener("load", () => resolve(image), { once: true });
        image.src = src;
    });
}

function checkColors(ctx, w, h, is_verticle, expectedColors) {
    let data = ctx.getImageData(0, 0, w, h).data;
    row_width = 80;
    col_width = 80;

    for (let [row, col, r, g, b, a] of expectedColors) {
        let x = col * row_width + 10;
        let y = row * col_width + 10;
        let i = (x + y * w) * 4;

        let expected = [r, g, b, a];
        let actual = [data[i], data[i + 1], data[i + 2], data[i + 3]];

        assert_array_approx_equals(actual, expected, 1, `Pixel value at (${x},${y}) ${expected} =~ ${actual}.`);
    }
}

for (let orientation of [1, 2, 3, 4, 5, 6, 7, 8]) {
    async_test(function(t) {
        const canvas = document.createElement("canvas");
        canvas.width = 160;
        canvas.height = 320;
        document.body.append(canvas);

        const ctx = canvas.getContext("2d");
        loadImage(`resources/squares_${orientation}.jpg`)
            .then((image) => createImageBitmap(image, { imageOrientation: "none" }))
            .then(t.step_func_done(function(imageBitmap) {
                ctx.drawImage(imageBitmap, 0, 0, 160, 320);

                checkColors(ctx, canvas.width, canvas.height, false, [
                    // row, col, r, g, b, a
                    [0, 0, 0, 0, 0, 255],
                    [0, 1, 128, 128, 128, 255],
                    [1, 0, 0, 0, 255, 255],
                    [1, 1, 128, 128, 255, 255],
                    [2, 0, 0, 255, 0, 255],
                    [2, 1, 128, 255, 128, 255],
                    [3, 0, 255, 0, 0, 255],
                    [3, 1, 255, 128, 128, 255],
                ]);
            }));
    }, `createImageBitmap with Orientation ${orientation}`);
}

</script>
